The roles of ascorbic acid and glutathione in symptom alleviation to SA-deficient plants infected with RNA viruses

Salicylic acid (SA) is required for plant systemic acquired resistance to viruses. However, SA-deficient plants adapt to RNA virus infections better, which show a lighter symptom and have less reactive oxygen species (ROS) accumulation. The virus replication levels are higher in the SA-deficient pla...

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Bibliographic Details
Published in:Planta 2011-07, Vol.234 (1), p.171-181
Main Authors: Wang, Shao-Dong, Zhu, Feng, Yuan, Shu, Yang, Hui, Xu, Fei, Shang, Jing, Xu, Mo-Yun, Jia, Shu-Dan, Zhang, Zhong-Wei, Wang, Jian-Hui, Xi, De-Hui, Lin, Hong-Hui
Format: Article
Language:English
Subjects:
Agriculture
Arabidopsis - virology
Ascorbic Acid - pharmacology
Biological and medical sciences
Biomedical and Life Sciences
Ecology
Forestry
Fundamental and applied biological sciences. Psychology
Glutathione - pharmacology
Immunity, Innate
Infections
Inoculation
Life Sciences
Original Article
Plant Diseases - therapy
Plant Diseases - virology
Plant Sciences
Plant Viruses - physiology
Plants
RNA
RNA Viruses - physiology
Salicylic Acid - metabolism
Seedlings
Standard deviation
Superoxides
Symptoms
Virus replication
Virus Replication - drug effects
Viruses
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Summary:Salicylic acid (SA) is required for plant systemic acquired resistance to viruses. However, SA-deficient plants adapt to RNA virus infections better, which show a lighter symptom and have less reactive oxygen species (ROS) accumulation. The virus replication levels are higher in the SA-deficient plants during the first 10 days, but lower than the wild-type seedlings after 20 dpi. The higher level of glutathione and ascorbic acid (AsA) in SA-deficient plants may contribute to their alleviated symptoms. Solo virus-control method for mortal viruses results in necrosis and chlorosis, no matter what level of virus RNAs would accumulate. Contrastingly, early and high-dose AsA treatment alleviates the symptom, and eventually inhibits virus replication after 20 days. ROS eliminators could not imitate the effect of AsA, and could neither alleviate symptom nor inhibit virus replication. It suggests that both symptom alleviation and virus replication control should be considered for plant virus cures.
ISSN:0032-0935
1432-2048
DOI:10.1007/s00425-011-1391-2